Multimedia Internet KEYing (MIKEY) General Extension Payload for Open Mobile Alliance BCAST 1.0
RFC 5410

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Network Working Group                                   A. Jerichow, Ed.
Request for Comments: 5410                        Nokia Siemens Networks
Obsoletes: 4909                                                 L. Piron
Category: Informational                                 Nagravision S.A.
                                                            January 2009

      Multimedia Internet KEYing (MIKEY) General Extension Payload
                   for Open Mobile Alliance BCAST 1.0

Status of This Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (c) 2009 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents (http://trustee.ietf.org/
   license-info) in effect on the date of publication of this document.
   Please review these documents carefully, as they describe your rights
   and restrictions with respect to this document.

Abstract

   This document specifies a new Multimedia Internet KEYing (MIKEY)
   General Extension payload to transport the short-term key message
   (STKM) and long-term key message (LTKM) payloads as well as the
   management data LTKM reporting message and parental control message
   payloads defined in the Open Mobile Alliance's (OMA) Broadcast
   (BCAST) group's Service and Content protection specification.

Jerichow & Piron             Informational                      [Page 1]
RFC 5410                 OMA BCAST MIKEY GenExt             January 2009

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 3
   3.  MIKEY General Extension for OMA BCAST Usage . . . . . . . . . . 3
   4.  Interoperability Considerations . . . . . . . . . . . . . . . . 4
   5.  Security Considerations . . . . . . . . . . . . . . . . . . . . 4
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5
   7.  Changes since RFC 4909  . . . . . . . . . . . . . . . . . . . . 5
   8.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 5
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 6
     9.1.  Normative References  . . . . . . . . . . . . . . . . . . . 6
     9.2.  Informative References  . . . . . . . . . . . . . . . . . . 6

1.  Introduction

   The Multimedia Internet KEYing (MIKEY) protocol specification (RFC
   3830 [RFC3830]) defines a General Extension payload to allow possible
   extensions to MIKEY without having to allocate a new payload type.
   The General Extension payload can be used in any MIKEY message and is
   part of the authenticated/signed data part.  There is an 8-bit type
   field in that payload.  The type code assignment is IANA-managed, and
   RFC 3830 requires IETF consensus for assignments from the public
   range of 0-240.

   The Open Mobile Alliance's (OMA) Broadcast (BCAST) group's Service
   and Content Protection specification [SPCP] specifies the use of a
   short-term key message (STKM), a long-term key message (LTKM), an
   LTKM reporting message, and a parental control message that carry
   attributes related to Service and Content protection.  Note that any
   keys associated with the attributes, such as the Parental Control
   Pincode if present, are part of the MIKEY KEMAC payload.

   This document specifies the use of the General Extension payload of
   MIKEY to carry the messages mentioned above, as well as protection of
   the credentials using mechanisms supported by MIKEY with
   modifications in [RFC3830].

   RFC 3830 [RFC3830], the MIKEY General Extension payload defined in
   RFC 4563 [RFC4563], and the 3rd Generation Partnership Project
   (3GPP)'s Multimedia Broadcast/ Multicast Service (MBMS) document
   [3GPP.33.246] specify the transport of MIKEY messages via unicast or
   broadcast; the OMA BCAST specifications use either for transport of
   MIKEY messages.

Jerichow & Piron             Informational                      [Page 2]
RFC 5410                 OMA BCAST MIKEY GenExt             January 2009

2.  Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

   OMA BCAST MIKEY General Extension: We refer to the General Extension
   type -- 5 -- as the OMA BCAST MIKEY General Extension.

3.  MIKEY General Extension for OMA BCAST Usage

   The OMA BCAST Type (Type 5) formats the MIKEY General Extension
   payload as follows:

                       1                   2                   3
   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+